We cover a full range of baby items, such as baby rattle, baby teether, baby musical ,baby squeaker,baby hammock, baby comfort towel,blanket, baby gym and so on. We have a very strong OEM&ODM designing team. Annually, we will design more than 200 new items for our customer to select. Customized design is welcomed.
Here we provide one stop service from design patterning, sampling, manufacture and quality control. to ensure Safe, Excellent QUALITY & BEAUTIFUL products
Our toys are followed strictly international standards such as EN71 &ASTM963. We have passed BSCI, Sedex certificate.
Unicorn Plush Toy,Squeaker Toys,Animal Squeaker,Cartoon Squeaker Ningbo Dikai Imp&Exp Co., Ltd , https://www.longkaitoys.com
Mercury content in pure copper
Mercuric compounds in sample are broken down and oxidized to mercuric ions by strong acids and oxidant in pretreatment. Mercury is reduced to Hg(0) state by stannous chloride and aerated ,then pass through the absorbtion cell to be measured at 253.7nm absorbance based on AAS.